Equilibrium Removal of Pb (II) Ions from Aqueous Solution onto Oxidized-KOH-Activated Carbons

다국어 초록 (Multilingual Abstract)

In the present study, the removal of Pb (II) ions on oxidized activated carbons (ACs) was investigated. ACs were derived from activation of indigenous cotton stalks waste with potassium hydroxide (KOH) in two-stage process. The KOH-ACs were subjected to liquid-phase oxidation with hot HNO3 and one untreated sample was included for comparison. The obtained carbons were characterized by Fourier transform infrared (FTIR), slurry pH and N2-adsorption at 77 K, respectively. Adsorption capacity of Pb (II) ions on the resultant carbons was determined by batch equilibrium experiments. The experimental results indicated that the oxidation with nitric acid was associated with a significant increase in mass of yield as well as a remarkable reduction in internal porosity as compared to the untreated carbon. The AC-800N revealed higher adsorption capacity than that of AC-800, although the former sample exhibited low surface area and micropore volume. It was observed that the adsorption capacity enhancement attributed to pore widening, the generation of oxygen functional groups and potassium containing compounds leading to cation-exchange on the carbon surface. These results show that the oxidized carbons represented prospective adsorbents for enhancing the removal of heavy metals from wastewater.

참고문헌 (Reference)

1 Reddad Z, 36 : 2067-, 2002

2 El-Sherif IY, 33 : 199-, 2007

3 Ferro-Garcia MA, 28 : 545-, 1990

4 Kobya M, 96 : 1518-, 2005

5 Tangjuank S, 52 : 110-, 2009

6 Giles CH, 3973-, 1960

7 Imamoglu M, 228 : 108-, 2008

8 Ma QY, 29 : 1118-, 1995

9 Bhattacharjee S, 37 : 3954-, 2003

10 Balaria A, 63 : 577-, 2008

11 Li K, 181 : 440-, 2010

12 El-Shafey EI, 77 : 429-, 2002

13 Park SJ, 249 : 458-, 2002

14 Monser L, 26 : 137-, 2002

15 Shen W, 1 : 27-, 2008

16 Xu T, 16 : 401-, 2008

17 Gil A, 12 : 51-, 1997

18 Rodriguez-Reinoso F, 36 : 159-, 1998

19 Moreno-Castilla C, 36 : 145-, 1998

20 Adib F, 34 : 686-, 2000

21 Gomez-Serrano V, 291 : 109-, 1997

22 Lozano-Castello D, 39 : 741-, 2001

23 Oh GH, 81 : 327-, 2002

24 Oh GH, 4 : 180-, 2003

25 Chunlan L, 43 : 2295-, 2005

26 Yun CH, 39 : 559-, 2001

27 El-Hendawy ANA, 82 : 272-, 2008

28 Girgis BS, 86 : 180-, 2009

29 Gomez-Serrano V, 59 : 846-, 2005

30 Cordero T, 41 : 6042-, 2002

31 El-Hendawy ANA, 41 : 713-, 2003

32 Malik DJ, 36 : 1527-, 2002

33 Choma J, 16 : 295-, 1998

34 Fathy NA, "Physico-Chemical and Adsorption Studies on Activated Carbon Prepared from Peach Stones [MS Thesis]" Cairo University 2006

35 Badie S. Girgis, "Impact of Air Convection on H3PO4-Activated Biomass for Sequestration of Cu (II) and Cd (II) Ions" 한국탄소학회 10 (10): 114-122, 2009

36 Faust SD, "Chemistry of Water Treatment" 1983

37 Yang RT, "Adsorbents: Fundamentals and Applications" Wiley-Interscience 2003

38 Bansal RC, "Activated Carbon Adsorption" Taylor & Francis 2005

39 김민식, "Acid Treatments of Carbon Nanotubes and Their Application as Pt-Ru/ CNT Anode Catalysts for Proton Exchange Membrane Fuel Cell" 한국탄소학회 11 (11): 224-230, 2010